You should be able to do that yourself.
On the left there is a possibility to award the point.
Then just move this subject to the solved puzzles.
hey, this is harder than guessing the cars - i can't see any button or anything on the left (or anywhere else for that matter) for awarding points and i can find a button for removing posts, but i can't find anything for just moving them. it isn't one of those types of forum functions you only get when you've made a certain number of posts by any chance?